Carbon Spacer 3-Pack

Product Overview

The Answer Carbon Headset Spacer Kit includes three carbon fiber headset spacers in 3mm, 5mm, and 10mm heights for precise stem positioning and steerer tube preload adjustment. Designed for 1" or 1-1/8" steerer tubes, these spacers provide lightweight performance at just 0.04 oz total weight. Available in two size options to fit different fork standards.

Key Features

• Carbon fiber construction – Lightweight carbon material reduces stem stack weight while providing adequate strength for headset preload
• Three spacer heights included – 3mm, 5mm, and 10mm spacers allow fine-tuning of handlebar height in precise increments
• Ultra-lightweight – Total kit weight of 0.04 oz (approximately 1.1 grams) adds minimal weight to cockpit setup
• Two steerer tube size options – Available for 1" or 1-1/8" steerer tubes to fit different fork and headset standards
• Stackable design – Multiple spacers can be combined to achieve desired stem height
• Clean aesthetic – Carbon finish provides premium appearance beneath stem

Technical Specifications

• Brand: Answer
• Material: Carbon fiber
• Spacer heights included: 3mm, 5mm, 10mm (3 spacers total)
• Total kit weight: 0.04 oz (approximately 1.1 grams)
• Steerer tube compatibility: 1" or 1-1/8" (specify at purchase)
• Bore diameter: Matches steerer tube size (1" = 25.4mm ID, 1-1/8" = 28.6mm ID)
• Outer diameter: Standard headset spacer OD for corresponding steerer size
• Recommended use: Road, mountain, BMX (any bike with threadless headset)

Compatibility and Ideal Use Cases

These spacers fit threadless headset systems only—will NOT work with threaded headsets or quill stems. The 1" version fits older BMX bikes, some vintage mountain bikes, and road bikes with 1" threadless forks. The 1-1/8" version fits most modern BMX, mountain, road, and gravel bikes with standard threadless forks. Critical: Verify your steerer tube diameter before ordering—using 1" spacers on 1-1/8" steerers (or vice versa) results in loose fit and unsafe headset preload. Ideal for weight-conscious riders building custom cockpits, racers seeking minimal stack weight, or anyone fine-tuning handlebar height on high-end builds. The three included heights (3mm, 5mm, 10mm) provide 18mm total spacing when stacked, covering most stem height adjustment needs. Carbon spacers are lighter than aluminum alternatives but less durable under overtightening or impact—avoid cross-threading or excessive top cap preload force. Best suited for riders who handle components carefully and want maximum weight savings. Not recommended for riders who frequently adjust stem height or rough handling situations where aluminum spacers offer better durability. Always leave at least 3-5mm of steerer tube extending above the stem before cutting—carbon spacers can be used above or below the stem to achieve proper stack height while maintaining adequate steerer tube engagement.